The theory must be judged is not a priory and abstract but empirical and pragmatic. In other word, the theory must be judge not by some preconceived abstract principle or concept unrelated to reality but by its purpose: to bring order and meaning to a mass phenomena which without it would remain disconnected and unintelligible. It must meet a dual test, an empirical and a logical one: is the theory consistent with the facts and within itself?
At this occasion we will discuss about realism. Realism concern with human nature as it actually is, and with the historic processes as they actually take place. Political realism is based upon a pluralist conception of human nature. Real man is composite of “economic man”, ”political man”, ”moral man”, ”religious man”, etc. Recognizing that these different faces of human nature exist, political realism also recognizes that in order to understand one of them one has to deal with it on its own terms.

Six Principles of Political Realism.
1. Political realism believes that politics is governed by objective laws that have their roots in human nature
2. The main sign post that helps political realism to find its way through the landscape of international politics is the concept of interest defined in terms of power.
3. Realism assumes that its key concept of interest define as power is an objective category which universally valid but it does not endow that concept with a meaning that is fixed once for all.
4. Political realism is aware of the moral significance of political action.
5. Political realism refuses to identify the moral aspiration of a particular nation with the moral laws that govern the universe.
6. The political realist maintains the autonomy of the political sphere as the economist, the lawyer, the moralist maintain theirs.